Said swainf assigxojl to cilvules p



(No Model.)

G. PLAYFORD & G. R. SWAINE.

SMOKE PREVENTING FURNACE.

Batented A pr. 29, 1884.

Lumen/101m. a W fifif e Z UNITED STATES PATENT OFFICE.

lEORGE ILAXFUHI) AND (I l lfilltllfi HlCHARD S\VAl I, ()F Clil'lVl'lliANl), OHIO:

SAID S-IUNIC ASSTHNOH TU CHARLES F. ATLAXANDER, ()l SAME llli\(l SMOKE-PREVENTlNG FURNACE.

SPECIFICATION forming part of Letters Patent NO. 297,630. dated April 29. 1884,

Application lilvd June 29, i593.

To all whom, 2 6 uty eoncern:

Be it known that we, (lnonon Pmvroun and tlllondl; R. SWAINM, both of Cleveland, in the county ot'tnyahoga and State ol'Ohio,

haveinvented new and useful lmprovements in Smoke lhreventing Furnaees, of which the following is a specification.

This invention relates to coal-burning turnaces, and has for its object to prevent the ne- IQ eumulation of smokeby the eomplete combustion of all the fuel. This is aeeomplishml by providing an endless traveling grate and an automatic sel f-t'eedi n g dev ice, whereby the fuel is fed in a steady stream in small quantities in such a manner that the fuel and all its gases are burned.

Our improvements relate to the traveling grate; and it eonsists in the construction and arrangement of the grate-bars and the mechanism iorearrying them and supporting them on atruek or iarriage, as hereinafter described and claimed.

in the accompanying drawings, l igure 1 is a side elevation of our improved endless traveling grate as seen in place under a boiler. Fig. 2 is a front elevation ot' the same. Fig. 3 is a top or plan view of a portion of the grate-bars. Fig. 4 is a detached view of one of the grate-bars. Fig. 5 is a detached view of one of the sproeket-wlreels. Fig. 13 is one ot the central supportingrollers.

A is the under side of a. boiler; ll, a bridgewall atbaek of fire-place. Within the said tire-place we supply a carriage or truck, (3, running on suitable rails or track laid on the lloor of said tire-place. In the upper corners of said carriage-frame arejournaled shafts earrying the sprocket-w]:eels, caeh l) I), and at suitable intervals between said shat'ts are placed other shat'ts, l] E, journaled in the sides of the frame. These shatts earry each a wheel. or roller, 0, for supporting the ventral part of the traveling grate.

11 F are two series at gratebars, the individual bars of which have links ff on each end, by which they are eoupled together. Every alternate bar has its link nearer the end of the bar than its mate, as seen at l", Fig. 3. This arrangement gives a space for the sprockets on the Wheels 1) to engage with the links for propelling the grate. "lhe pivots which (No model.)

join the bars to one :mothereonsist ot' rodsf each of whieh extends the Full width of the grate and passes through all the links of the contiguous bars of both series, between which bars said rod is situated. lirmness and simultaneous movement are thus insured to the grate, though made 01' two or more series of bars, said continuous pivots fserving to eonneet the different series of bars.

1 do not consider it essential to the operation of my invention that all of the pivots should be made continuous and connect the different carriers or series ot'bars, as a fewer numberas every other onemight be sut'lieieut to aeeompli sh the above-nientioned results, the bars at the other points of pivoting being eonneeted in any preferred manner. In the drawings two rows of bars are shown; but this number may be modilied to one or more, as may be desired. The middle supptn'ting-ri'illm's are not provided with sproekets, but have notches in the edges of their peripheries for the link-joints to work, to prevent a jumping movement the g ate would have without thisprovision. The front shat't extends beyond the frame, and is provided with a gear and worm, (t, by which motion isimparted l'rom suitabie power source for propelling the grate. To the boiler-front is made a hopper for containing fuel, the bottom of which sets over the trout end of the grate. The opening through which the fuel is fed is regulated by a sliding door, if, by which the quantity supplied to the tire is governed.

At the back part ol' the fireplace is made a chamber For catching theelinker and ciuders, consisting of a partition, .1, having a curved upper part, over which the elinker is discharged from the grate. The said partition is provided with a door. .I', at the bottom, l'orallowing the clinker and einders to be raked out when required.

These grate-bars aresimple in eonstruetion, are easily eintpled together, and in ease of repairs are readily removed or replaced by new ones.

The principle upon which this grate is on erated is that the the] is fed no I'aster than it can be consumed, so that all the gases and the live fire at the rear portion of the grate, and are therefore consumed. The grate is also protected from being soon burned out, from the fact that it is in constant motion, and onehalf the time each bar is traveling under side in the truck away from the fire, and is thereby given time and opportunity to cool down. The grate will therefore last much longer.

Having described our invention, we claim 1. The herein-described traveling grate, eon sisting of the combination of two or more series of t ansverse bars, the bars of each series being pivotally connected to form an endless carrier, and the different series connected by means, substantially as described, whereby the unity of the grate is insured and the removal of the individual bars permitted, substantiall y as set forth.

2. The herein-described traveling grate, consisting of the combination of two or more series of transverse bars, said bars beingj oined to one another by continuous pivots, which also connect the different series with one another, substantially as set forth.

3. Theherein-described traveling grate, coir sisting ofthe combination, with the transverse bars pivoted together to form an endless can rier, and having the downwardly-projeeting linksf, of intermediate supporting-r0]lers recessed to lit said projections, substantially as set forth.

4. The herein-described traveling grate, eonsisting of the combination of two or more endless earrlers formed of gratebars, said earriers being arranged side by side, and connected by means, substantially as described, with one another, and intermediate support ing-rollers arranged on the line or lines of junction of said carriers, substantially as set forth.

5. Theherein-desm'ibed travelinggrate, consisting of the combination of two or more series of transverse bars, said bars being joined to one another by continuous pivots, which also connect the diii'erent series with one another, and an intermediate supporting roller or rollers arranged on the line ofjuneture of the different series, substantially as set forth.

GEORG 1) PL A YFOR I GEOl-{UE RHHAIH) :YAINE.

\Vitnesses:

M. U. Nonrolv, (mo. \V. lllnnlrrs. 

